Posted by **adam** on Monday, September 6, 2010 at 4:44pm.

just like to check if ive got these right. if not can you help??

make the subject (q)

p(q+r)=2(q-p)

ans q=pr+2p/(2-p)

make the subject (p)

p+3=qp+r/(2)

ans p=r-6/(2-q)

make the subject (r)

p(r-q)=2+3(q-r)

ans r=2+3q+pq/(p+3)

make the subject (x)

y=r-qp/(x)

ans x=r-qp/(y)

- 12th grade maths -
**jai**, Tuesday, September 7, 2010 at 5:21am
the second one:

make the subject (p)

p+3=qp+r/(2)

..is wrong,, must be:

ans: p=r-6/(2-2q)

the third one:

make the subject (r)

p(r-q)=2+3(q-r)

..is lacking parenthesis,, must be:

ans: r=(2+3q+pq)/(p+3)

the last one is wrong,,

y=r-qp/(x) *transpose r to left side

y-r = -qp/x *multiply both sides by x

x(y-r) = -qp *divide both sides by (y-r)

x = (-qp)/(y-r)

so there,, =)

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